Okay - I was able to find one problem.... I was running rsync 2.5.7 on =
the
RedHat BackupPC server (DOH!). I've upgraded it to 2.6.2 and things =
*seems*
to be running smoother on the Windows client...
As for memory footprint: on the WinXP box there are currently two =
processes
(one for the service, one for the actual rsync process - I would =
assume). =20
Image Name User Name CPU Mem Usage
rsync.exe SYSTEM 00 1,260 K
rsync.exe SYSTEM 07 14,176 K
The WindowsXP box now is sluggish, rather than completely useless, when =
the
backup occurs. I did JUST notice that the process has spiked to 37%
occasionally - but tends to stay aroun 10-17%...
As for upgrading the cygwin1.dll... Well if it were as easy as dropping =
in a
DLL I can download from somewhere - everyone would be doing it. =20
If anyone can hold my hand and help me compile a new cygwin1.dll with =
Visual
Studio .NET (off the mailing list) - I would appreciate it.
Thanks!
--b
--
Ben Higgins | Worcester Polytechnic Institute - ME Department
100 Institute Road | Computer Operations Manager, HL249
Worcester, MA 01609 | Phone: (508) 831-6756 FAX: (508) 831-5680
=20
-----Original Message-----
From: Craig Barratt [mailto:cbarratt < at > users.sourceforge.net]=20
Sent: Friday, July 09, 2004 12:40 AM
To: Higgins, Benjamin John
Cc: backuppc-users < at > lists.sourceforge.net
Subject: Re: [BackupPC-users] Rsyncd slows Windows XP=20
=20
Ben writes:
=20
I've deployed the rsyncd daemon which is available from=20
http://backuppc.sf.net to several computers - one of which is=20
WindowsXP SP2 RC2.
=20
When the BackupPC server triggers a backup of the WinXP=20
machine - the=20
XP machine slows to a crawl. There is very little CPU=20
usage, but all=20
the foreground programs are sluggish to respond. The=20
backup job DOES=20
complete - 26gb over 290 minutes for a full backup - but the=20
workstation is still slow during this time. And the=20
workstation is a P4-2.8ghz with 512 memory.
=20
Has anyone else had these problems? My complaint is=20
less the speed=20
of the backup, but more of why the workstation slows to a=20
crawl during=20
the operation...
=20
I've haven't tried SP2, so I don't know if this is an issue=20
specific to SP2.
=20
How much memory is rsync using when it is running? Rsync=20
builds a complete list of files in memory first, so the=20
amount of memory being used is proportional to the total=20
number of files. If that uses a good chunk of the physical=20
memory then that would explain the application slow down. If=20
rsync memory usage is large, I would recommend breaking the=20
backup into several pieces by splitting it into multiple shares.
=20
Secondly, when rsync has to read files that seems to cause=20
application memory to get swapped out. I find on my WinXP=20
laptop that after an rsync backup it takes several seconds=20
for applications to
=20
My experience is that rsync has less impact on Win system=20
performance versus smb, but other people report the opposite.=20
So you could try smb instead.
=20
Also, there might be some registry tweaks, or settings in the=20
WinXP Control Panel -> System -> Advanced -> Performance ->=20
Settings dialog that might make a difference.
=20
Finally, the cygwin developers claim a significant=20
performance improvement in cygwin 1.5.10, but I haven't tried=20
it yet so I don't know if it makes much difference with=20
rsync. You could try the latest cygwin1.dll version 1.5.10.
=20
Craig
=20
=20
=20
